CONTENTS
120CR
160CR
Page
1. SPECIFICATIONS ........................................................................................ 1
2. INITIALIZE (MAC) OPERATION .................................................................. 2
3. BLOCK DIAGRAM ....................................................................................... 3
3-1. PCB CONNECTION ..................................................................................................... 3
3-1. BLOCK DIAGRAM ....................................................................................................... 4
4. DISASSEMBLY ............................................................................................ 5
5. CIRCUIT EXPLANATION ............................................................................ 8
5-1. Power supply circuit .................................................................................................. 8
5-2. Reset circuit ................................................................................................................ 9
5-3. Data communication between CPU and EEPROM ................................................ 10
5-4. Printer drive circuit ................................................................................................... 12
5-5. Pin description (CPU uPD78043FGF) ..................................................................... 12
6. DIAGNOSTIC OPERATIONS .................................................................... 14
6-1. To start the diagnostic operation ............................................................................ 14
6-2. Check items .............................................................................................................. 14
6-3. Operations ................................................................................................................. 15
7. ERROR CODE LIST ................................................................................... 19
7-1. Operation error code ................................................................................................ 19
8. IC DATA ..................................................................................................... 20
9. PCB LAYOUT ............................................................................................ 21
10. CIRCUIT DIAGRAM ................................................................................... 22
11. PARTS LIST ............................................................................................... 29
